EP3555720A1 - Véhicule robotisé ayant une trajectoire et des mesures de sécurité définies - Google Patents

Véhicule robotisé ayant une trajectoire et des mesures de sécurité définies

Info

Publication number
EP3555720A1
EP3555720A1 EP17821825.1A EP17821825A EP3555720A1 EP 3555720 A1 EP3555720 A1 EP 3555720A1 EP 17821825 A EP17821825 A EP 17821825A EP 3555720 A1 EP3555720 A1 EP 3555720A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
behaviour
path
expected
controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17821825.1A
Other languages
German (de)
English (en)
Inventor
Kenneth Skovbo Lott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Engbakken Group's Holding Aps
Original Assignee
Sidis Robotics ApS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sidis Robotics ApS filed Critical Sidis Robotics ApS
Publication of EP3555720A1 publication Critical patent/EP3555720A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/02—Control of position or course in two dimensions
    • G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
    • G05D1/0276—Control of position or course in two dimensions specially adapted to land vehicles using signals provided by a source external to the vehicle
    • G05D1/0278—Control of position or course in two dimensions specially adapted to land vehicles using signals provided by a source external to the vehicle using satellite positioning signals, e.g. GPS
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/02—Control of position or course in two dimensions
    • G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
    • G05D1/0268—Control of position or course in two dimensions specially adapted to land vehicles using internal positioning means
    • G05D1/027—Control of position or course in two dimensions specially adapted to land vehicles using internal positioning means comprising intertial navigation means, e.g. azimuth detector
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/0055—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots with safety arrangements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/0088—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots characterized by the autonomous decision making process, e.g. artificial intelligence, predefined behaviours

Definitions

  • the present invention relates to a robotic vehicle operated to move along a defined path, where the vehicle could be for mowing the lawn or for agricultural purposes having an operational part operating on an irregular surface.
  • the control of the vehicle includes safety means to check that the vehicle seems to have left its path unintended.
  • the object of the present invention is to ensure that a vehicle running under the control of a position recognition system to be running along defined path will not diverge substantially from this defined path without this being discovered, even though it appears to be on track according to the position recognition system.
  • the object is solved by introducing an additional safety control of the vehicle including data being independent on the position recognition system, as it is given in the claims.
  • the solution includes the robotic vehicle being operated through a position recognition system to direct it to a defined next position, where the path to said next position is associated with an expected behaviour of said vehicle, where the vehicle further comprises means for measuring an actual behaviour of said vehicle said means being positioned on said vehicle and being independent of said position recognition system, and a controller comparing the actual behaviour to the expected behaviour when the vehicle reaches within a define distance to said next position.
  • the vehicle thus follows a track, or defined path, from a present position to a next defined position, where this position may be defined when the vehicle passes the present position and its expected behaviour along the path to the next defined position may be defined here.
  • a path including a plural of positions each associated to an expected behaviour of the vehicle in its movement from a previous position.
  • the path could be pre-defined before starting the vehicle, or when reaching a position then a plural of next positions with associated behaviours may be defined.
  • areas are defined each associated with an expected behaviour when the vehicle passes an area. This could in an embodiment be the area where the vehicle is expected to operate being divided into a plural of areas, and where movements between the areas are defined according to pre- knowledge of the topologies of the areas.
  • the means measuring the actual behaviour will be independent on the position recognition system in the sense that the actual measurement data itself is measured directly on the vehicle the only possible influence from the position recognition system being to associate the data to a specific position.
  • the controller may comprise means to store the path data, the expected behaviour for each position and / or the measured actual behaviour for each position. Further it would include any means to process the data, to communicate with the position recognition system devices and the means for measuring the actual behaviour of the vehicle.
  • the controller comprises a first controller associated to the steering of the vehicle and a second controller associated to the safety procedure and including the means to store the expected behaviour for each position and the measured actual behaviour for each position, the second controller thus running independently from the first controller optionally solely being associated to this path checking safety procedure.
  • the position recognition system comprises a first part adapted cooperate with the first controller and a second part adapted to cooperate with the second controller.
  • the second part adapted to cooperate with the second controller providing the position input that a comparison of the actual behaviour of the vehicle is to the expected behaviour.
  • position recognition device e.g. GPS
  • the position recognition system comprises the position recognition device(s), where this in an embodiment is a satellite navigation system.
  • a natural choice for the expected behaviour of the vehicle in an embodiment includes acceleration, velocity and / or a direction of the vehicle.
  • the expected behaviour data for a position is related to one pre-defined set of measurement data along the path, thus one measurement of actual behaviour at the position, or at least in the vicinity of the position, is related to a similar set of expected behaviour data associated to this position.
  • each of the positions is related to the pre-defined set of measurement data along a sub-section of the path, thus for each of the positions the expected behaviour data of the vehicle is related to a plural of measurements along a sub-path of the defined path at a number of positions e.g. to give an aggregate or average number, or simply comparing each of the individual measurement actual behaviour data along the sub-section to the expected behaviour data.
  • the present invention further relates to the method to control a robotic vehicle, said method being to use a position recognition system to direct it to a defined next position, where the path to said next position is associated with an expected behaviour of said vehicle, where the vehicle further comprises means for measuring an actual behaviour of said vehicle said means being positioned on said vehicle and being independent of said position recognition system, and a controller comparing the actual behaviour to the expected behaviour when the vehicle reaches within a define distance to said next position.
  • FIGURES Fig. 1 A robotic vehicle operated on an irregular surface under input from a position recognition system like GPS.
  • Fig. 2 A robotic vehicle being controlled along a path.
  • Fig. 3 A two part controlling system of an robotic vehicle in a first embodiment.
  • Fig. 4 A two part controlling system of an robotic vehicle in a second embodiment.
  • Fig. 5 A two part controlling system of an robotic vehicle in a third embodiment.
  • Fig. 6 A two part controlling system of an robotic vehicle in a sixth embodiment.
  • Fig. 7 A robotic vehicle being controlled within a border comprising predefined areas.
  • Fig. 8 A flow chart illustrating the method of the safety procedure in the control of the vehicle. DETAILED DESCRIPTION OF THE INVENTION
  • Fig. 1 illustrates a robotic vehicle (1 ) operated through a position recognition system (2) of any kind, such as a satellite navigation system (2) like GPS, GLONASS etc.
  • a position recognition system (2) like GPS, GLONASS etc.
  • the vehicle (1 ) may be an autonomously moving device having an operational part to work on an irregular surface (3), such as the ground surface.
  • the vehicle (1 ) When the vehicle (1 ) is controlled according to a defined path (4) (see fig. 2) it may be essential to ensure the vehicle (1 ) stays sufficiently close on this path and does not get to places where it potentially may do harm to objects, especially living beings, or even to itself. This is especially relevant for vehicles (1 ) e.g. like lawn mowers or for agricultural purposes having an operational part e.g. being cutting tools.
  • Fig. 2 illustrate the robotic vehicle (1 ) running along the defined path (4) that could be a path stored in a data logging system and could be produced in any possible manner like physically running the vehicle (1 ) along the path during some initialization process making and storing position measurements, it could also be done by plotting the path on an electronic map, or in any other manner.
  • a plural of positons (5) is defined where each of the positions (5) are being associated with an expected behaviour of said vehicle (1 ).
  • the positions (5) divides the path (4) into sub-sections defined between any two neighbouring positons (5) seen in relation to the expected movement of the vehicle (1 ) along said path (4).
  • the expected behaviour could be an
  • a safety procedure is activated of the vehicle (1 ).
  • a deviation rule could be anything like a fixed and defined actual difference threshold between the two values, the expected behaviour and the actual behaviour, a fixed and defined percentage difference, or could in any manner be related to the acceleration, velocity (possible including a direction of the vehicle (1 )), position of the vehicle (1 ), a height above water level, etc., it could e.g. be a defined difference under some rule defined specifically for each of the positions (5).
  • the vehicle (1 ) comprises means (9) able of making this measurement, such as e.g. for measuring the acceleration and / or velocity of the vehicle (1 ).
  • Such devices are well known in the art e.g. accelerometers of any kind, the data being stored in the data logging means (8) (see fig. 3) as the measured actual behaviour.
  • a border (6) defining the outermost allowed edge for the movement of the vehicle (1 ).
  • Fig. 3 illustrate the control setup of the vehicle (1 ) formed of a controller (7) that comprises a first controller (7a) associated to the steering of the vehicle (1 ) and wherein the position recognition system (2) comprises a control part (2a) adapted cooperate with the first controller (7a)
  • the first controller (7a) operates with the steering of the vehicle (1 ) to follow the defined path (4), setting its speed and direction according to the position input received from the control part (2a) of the position recognition system (2).
  • the controller (7) further comprises a second controller (7b) associated to the safety procedure and including the means (8) to store e.g. the expected behaviour associated with each of the defined positions (5) (optionally the position itself and/or the path data) and the measured actual behaviour for each position (5).
  • the controller (7) may be a single controller with e.g. a processor adapted to operate as two independent controllers, the first controller (7a) and second controller (7b) or may be separate controllers/processors.
  • This second controller (7b) forms an additional safety to the operation of the vehicle (1 ).
  • the first part (2a) of the position recognition system (2) being involved with the control and steering of the vehicle (1 ) may at some time e.g. give a wrong measurement of its actual position.
  • the vehicle (1 ) thus could actually being directed outside the border (6) and optionally in contact with living beings etc., though the first controller (7a) expects it to be running along the defined path (4).
  • the second controller (7b) receiving measurements on the actual behaviour of the vehicle (1 ) from measuring means (9), these then can be compared to the expected behaviour at the expected position (5) of the vehicle (1 ). Since the defined path (4) usually is meandering frequently changing is direction the vehicle (1 ) often changes its direction and velocity and thus also acceleration. Also, the changes in the irregular surface (3) could influence the behaviour of the vehicle (1 ).
  • the defined checking positions (5) along the defined path (4) thus will be associated with expected behaviour data at one measurement position of the vehicle (1 ) at least in the near vicinity of the position (5), but could also be related to an set of measurements along a sub-section or the whole of the path (4), e.g. to give an aggregate or average number, or simply comparing each of the individual measurement actual behaviour data along the sub-section to the expected behaviour data.
  • the position recognition system (2) comprises a safety part (2b) adapted to cooperate with the second controller (7b) in addition to the means (9) for measuring the actual behaviour.
  • the control (2a) and safety parts (2b) of said position recognition system (2) may form part of the same position recognition device, e.g. GPS, each of the first (7a) and second (7b) controllers comprising or communicating with their own separate position recognition device (GPS etc.) or they may each their own separate one, or just get the information from separate and independent paths.
  • The may operate independently such that the safety data is independent on the operational, or control data, such that an error in the one would not be repeated in the other.
  • the safety part (2b) of the position recognition system (2) gives an additional information to the second controller (7b) as an additional safety information. This thus could include into the expected behaviour the expected position too, such as the vehicle (1 ) actually being at the position (5) at the expected time.
  • Figs. 5 and 6 illustrate the same systems as figs. 3 and 4, only where the controller (7) is illustrated as a 'controller system' (7) formed of two independent controllers, the first controller (7a) for controlling the vehicle (1 ) along the path (4) and the second controller (7b) being the safety controller.
  • the controller (7) is illustrated as a 'controller system' (7) formed of two independent controllers, the first controller (7a) for controlling the vehicle (1 ) along the path (4) and the second controller (7b) being the safety controller.
  • the two controller (7) is illustrated as a 'controller system' (7) formed of two independent controllers, the first controller (7a) for controlling the vehicle (1 ) along the path (4) and the second controller (7b) being the safety controller.
  • controllers (7a) and (7b) then would operate totally independent and include their own processor(s).
  • the positions (5) are not related to a pre-defined path (4), but where the path (4) are to be understood as an defined area within which the movement of vehicle (1 ) is confined.
  • the path (4) may be defined prior to stating the vehicle (1 ), or it may be generated as the vehicle (1 ) moves, such as by random movement, or by selection of a next section of a path (4), e.g. by selecting a next position (5) being a target position.
  • the positions (5) then rather than being given in relation to a path (4) then is linked to actual pre-defined positions (5) in the area as defined by border (6), such as in one embodiment to be positioned in a grid, though it could also be distributed over the area in any other manner, such as by taking the area topology into account.
  • This embodiment would also allow the vehicle (1 ) not to follow a path (4) that can be given during its movement.
  • a next position (5) could be defined, possible by 'random' selection.
  • the pre-defined path (4) as described in relation to fig. 2 thus could be related to only the section between the present and the next defined position (5), thus 'pre-defined' related to being defined at this stage, and the expected behavior calculated at this stage, such as based on a known topology.
  • the path (4) as such is not defined, but the as the vehicle (1 ) passes the areas (20) as described in relation to fig. 7, these areas (20) will define the expected behavior.
  • the present invention further relate to control the vehicle (1 ) through a position recognition system (2), where an embodiment is illustrated in fig. 8 .
  • the method includes:
  • a step (10) being to define an expected behaviour the vehicle (1 ) according to a movement on a surface within a given border (6).
  • This expected behaviour could be associated with a defined path (4) or with defined areas (20) according to the previously described embodiments.
  • the method further includes step (1 1 ) of controlling the vehicle (1 ) according to a path (4) from a position (5) to a next position (5) through said position recognition system (2).
  • a step (14) of each position (5) comparing the actual behavior to the expected behavior.
  • said expected behaviour of said method includes an acceleration, velocity, a position and / or a direction.
  • said behaviour at a position (5), expected and actual is related to a set of measurement data along the path (4), such as along a sub-section of the path (4) between said positions (5) and the previous position (5) along the path (4).
  • said behaviour at a position (5), expected and actual is related to said behaviour at said position (5).
  • the robotic vehicle (1 ) is comprises means and is adapted to operate in robotic mode according to the previously described embodiments, or in human controlled mode.
  • the means for the human controlled mode may include e.g. a seat and steering means like a joystick, a steering wheel etc.
  • the system such as the controller (7), remembers which of the positions (5) that have been Visited' in e.g. the human controlled mode, and thus excludes these from the next run in the robotic mode. In this manner, e.g. areas comprising trees, where pools of water may appear and disappear, could be managed in a human controlled mode, whereas the rest then subsequently could be managed in the robotic mode.
  • the positions (5) are 'excluded' does not imply the robotic vehicle (1 ) would not cross these positions (5), as this may be required when moving between 'unvisited' positions (5), but only that these does not form part of the positions (5) to be managed by the robotic vehicle (1 ).
  • all or some of the positions (5) is totally removed and thus will not be visited by the robotic vehicle (1 ) when in robotic mode.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Game Theory and Decision Science (AREA)
  • Medical Informatics (AREA)
  • Navigation (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

La présente invention a trait à un véhicule robotisé actionné pour se déplacer le long d'une trajectoire, le véhicule pouvant servir à tondre la pelouse ou à réaliser des activités agricoles et ayant une partie fonctionnelle qui fonctionne sur une surface irrégulière. La commande du véhicule inclut des moyens de sécurité pour déterminer que le véhicule semble avoir quitté sa trajectoire de manière involontaire.
EP17821825.1A 2016-12-19 2017-12-06 Véhicule robotisé ayant une trajectoire et des mesures de sécurité définies Withdrawn EP3555720A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201600770 2016-12-19
PCT/EP2017/081727 WO2018114341A1 (fr) 2016-12-19 2017-12-06 Véhicule robotisé ayant une trajectoire et des mesures de sécurité définies

Publications (1)

Publication Number Publication Date
EP3555720A1 true EP3555720A1 (fr) 2019-10-23

Family

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Application Number Title Priority Date Filing Date
EP17821825.1A Withdrawn EP3555720A1 (fr) 2016-12-19 2017-12-06 Véhicule robotisé ayant une trajectoire et des mesures de sécurité définies

Country Status (5)

Country Link
US (1) US11614749B2 (fr)
EP (1) EP3555720A1 (fr)
JP (1) JP2020502715A (fr)
CN (1) CN110268351A (fr)
WO (1) WO2018114341A1 (fr)

Families Citing this family (2)

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US20210365029A1 (en) * 2018-03-27 2021-11-25 Avidbots Corporation Safety systems for semi-autonomous devices and methods of using the same
WO2021115206A1 (fr) * 2019-12-13 2021-06-17 苏州宝时得电动工具有限公司 Dispositif automoteur et son procédé de fonctionnement

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Also Published As

Publication number Publication date
US20190391595A1 (en) 2019-12-26
WO2018114341A1 (fr) 2018-06-28
US11614749B2 (en) 2023-03-28
JP2020502715A (ja) 2020-01-23
CN110268351A (zh) 2019-09-20

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